Tennis superstars Venus and Serena Williams have written a book Serving From the Hip: 10 Rules for Living, Loving, and Winning as a guide for teenage girls. Even though the Williams sisters seem to live a superstar lifestyle, they say they were never immune to typical teenage self-esteem issues.

"Growing up we had a lot of insecurities," Serena says. "Even now we still have so many insecurities. It's not like we're perfect. … That's why we wanted to get together and write a book for teenagers who deal with the same issues. [We wanted] to let them know that celebrities and stars, not only just us, but everyone has these issues as well."